Method For Configuring CLI Measurement And Communications Apparatus

ABSTRACT

Example cross-link interference (CLI) measurement configuration methods and apparatus are described. In one example method, a first network device receives, from a second network device, a first message that indicates information about a CLI measurement. The first network device configures the CLI measurement for a terminal device based on the first message.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2019/116348, filed on Nov. 7, 2019, the disclosure of which ishereby incorporated by reference in its entirety.

TECHNICAL FIELD

This application relates to the field of communications technologies,and in particular, to a method for configuring CLI measurement and acommunications apparatus.

BACKGROUND

Time division duplex (TDD) is a duplex manner in which uplinktransmission and downlink transmission are implemented through timedivision. In a TDD communication mode, receiving and sending in acommunications system are performed at different times of a samefrequency. When TDD uplink/downlink patterns (TDD UL/DL pattern) ofneighboring cells are different, data sent in a cell may causeinterference to data received in another cell. This type of interferenceis referred to as cross-link interference (CLI).

As shown in FIG. 1, user equipment (UE) 1 is sending uplink (UL) data,and UE 2 is receiving downlink (DL) data. It is assumed that a servingcell of the UE 1 is a cell 1 and corresponds to a serving base station1, a serving cell of the UE 2 is a cell 2 and corresponds to a servingbase station 2, the cell 1 and the cell 2 are two neighboring cells, theUE 1 and the UE 2 are respectively located on an edge of the servingcell of the UE 1 and an edge of the serving cell of the UE 2, and adistance between the UE 1 and the UE 2 is relatively short. From aperspective of UE, when UL data sending of the UE 1 and DL datareceiving of the UE 2 are performed at the same time, the UL datasending of the UE 1 may cause CLI to the DL data receiving of the UE 2.From a perspective of a base station, when DL data sending of the basestation 2 and UL data receiving of the base station 1 are performed atthe same time, the sending of the base station 2 may cause CLI to thereceiving of the base station 1.

In conclusion, how to reduce impact of the CLI on communication is atechnical problem that needs to be resolved currently.

SUMMARY

This application provides a method for configuring CLI measurement and acommunications apparatus, to optimize CLI measurement.

According to a first aspect, this application provides a method forconfiguring CLI measurement. The method includes: A first network devicereceives a first message from a second network device. The first networkdevice configures CLI measurement for a terminal device based on thefirst message. The first message is used to indicate information aboutthe cross-link interference CLI measurement.

The method may be performed by a communications apparatus. Thecommunications apparatus may be the first network device or a module inthe first network device, for example, a chip.

Based on this solution, the first network device and the second networkdevice negotiate information about CLI measurement that is separatelyconfigured for the terminal device, so that the first network device andthe second network device can properly configure the information aboutthe CLI measurement for the terminal device. This helps avoid a case inwhich when the first network device and the second network deviceconfigure CLI measurement for a same terminal device, a limit of CLImeasurement that the terminal device needs to perform is exceeded, sothat the terminal device can still normally perform the CLI measurementin a scenario in which the terminal device is connected to the firstnetwork device and the second network device at the same time.

In this application, there may be the following two cases based on theinformation about the CLI measurement.

Case 1: The information about the CLI measurement includes a quantity ofresources of the CLI measurement.

Based on the case 1, the first message is used to indicate a quantity ofresources of the CLI measurement that are configured by the secondnetwork device for the terminal device. Alternatively, the first messageis used to indicate a maximum quantity of resources that are of the CLImeasurement and that the first network device is allowed to configurefor the terminal device. Alternatively, the first message is used toindicate a quantity of resources of the CLI measurement that areconfigured by the second network device for the terminal device in eachunit time. Alternatively, the first message is used to indicate amaximum quantity of resources that are of the CLI measurement and thatthe first network device is allowed to configure for the terminal devicein each unit time.

In a possible implementation, the first network device sends a secondmessage to the second network device if determining that the quantity,indicated by using the first message, of resources of the CLImeasurement does not meet a first threshold. The second message is usedto notify the second network device to adjust the quantity of resourcesof the CLI measurement that are configured for the terminal device, oris used to notify the second network device to adjust the quantity ofresources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device.

The first network device sends the second message to the second networkdevice. This helps avoid a case in which the first network device cannotconfigure the CLI measurement for the terminal device because thequantity, indicated by using the first message sent by the secondnetwork device to the first network device, of resources of the CLImeasurement is improper.

Case 2: The information about the CLI measurement includes configurationinformation of a resource of the CLI measurement.

Based on the case 2, the first message is used to indicate configurationinformation of a resource that is of the CLI measurement and that thesecond network device plans to configure for the terminal device.

In a possible implementation, the first network device may determine,based on the first message and configuration information of a resourcethat is of the CLI measurement and that the first network device plansto configure for the terminal device, a total quantity of resources ofthe CLI measurement that are configured by the first network device andthe second network device for the terminal device. The first networkdevice may adjust the configuration information of the resource that thefirst network device plans to configure for the terminal device if thetotal quantity is greater than a second threshold. Herein, the secondthreshold may be a maximum quantity of resources of the CLI measurement;or may be a maximum quantity, supported by the terminal device, ofresources of the CLI measurement; or may be a maximum quantity ofresources of the CLI measurement in each unit time; or may be a maximumquantity, supported by the terminal device, of resources of the CLImeasurement in each unit time.

The first network device adjusts the configuration information of theresource that is configured by the first network device for the terminaldevice. This helps avoid a case in which when the two network devicesconfigure, for the terminal device, the configuration information of theresource of the CLI measurement, the limit of the CLI measurement of theterminal device is exceeded.

In this application, the first message may alternatively be used toindicate that the second network device configures the CLI measurementfor the terminal device. Alternatively, the first message is used toindicate that the first network device is allowed to configure the CLImeasurement for the terminal device. Alternatively, the first message isused to indicate the first network device to configure the CLImeasurement for the terminal device. That is, only either of the firstnetwork device and the second network device configures the CLImeasurement for the terminal device.

Through negotiation between the first network device and the secondnetwork device, that only one network device configures the CLImeasurement for the terminal device can be implemented. That is, theterminal device receives the CLI measurement configured by the only onenetwork device for the terminal device. In this way, this helps avoid acase in which when the first network device and the second networkdevice configure the CLI measurement for the terminal device, the limitof the CLI measurement that the terminal device needs to perform isexceeded, so that the terminal device can still normally perform the CLImeasurement in the scenario in which the terminal device is connected tothe first network device and the second network device at the same time.

Further, optionally, the only one network device may configure the CLImeasurement for the terminal device within preset duration.

In a possible implementation, the first network device sends a thirdmessage to the second network device, and the third message is used toquery whether the first network device is allowed to configure the CLImeasurement for the terminal device.

When the first network device needs to configure the CLI measurement forthe terminal device, the first network device actively sends the thirdmessage to the second network device, and there is no need to wait forthe second network device to send the first message.

In a possible implementation, the resource includes a sounding referencesignal (SRS) resource or a received signal strength indicator (RSSI)resource.

According to a second aspect, this application provides a method forconfiguring CLI measurement. The method includes: A second networkdevice determines a first message. The second network device sends thefirst message to a first network device. The first message is used toindicate information about CLI measurement.

The method may be performed by a communications apparatus. Thecommunications apparatus may be the second network device or a module inthe second network device, for example, a chip.

For beneficial effects of this solution, refer to the descriptions ofthe beneficial effects of the first aspect. Details are not describedherein again.

In a possible implementation, the information about the CLI measurementincludes a quantity of resources of the CLI measurement. Herein, thefirst message is used to indicate a quantity of resources of the CLImeasurement that are configured by the second network device for aterminal device. Alternatively, the first message is used to indicate amaximum quantity of resources that are of the CLI measurement and thatthe first network device is allowed to configure for the terminaldevice. Alternatively, the first message is used to indicate a quantityof resources of the CLI measurement that are configured by the secondnetwork device for the terminal device in each unit time. Alternatively,the first message is used to indicate a maximum quantity of resourcesthat are of the CLI measurement and that the first network device isallowed to configure for the terminal device in each unit time.

In a possible implementation, the second network device may receive asecond message from the first network device, and adjust, based on thesecond message, the quantity of resources of the CLI measurement thatare configured by the second network device for the terminal device; orthe second network device adjusts, based on the second message, thequantity of resources that are of the CLI measurement and that the firstnetwork device is allowed to configure for the terminal device.

The second network device adjusts the quantity of resources that are ofthe CLI measurement and that the first network device is allowed toconfigure for the terminal device, or adjusts the quantity of resourcesof the CLI measurement that are configured by the second network devicefor the terminal device. This helps avoid a case in which the firstnetwork device cannot configure the CLI measurement for the terminaldevice because the quantity, indicated by using the first message sentby the second network device to the first network device, of resourcesof the CLI measurement is improper.

In a possible implementation, the information about the CLI measurementincludes configuration information of a resource of the CLI measurement.Herein, the first message is used to indicate configuration informationof a resource that is of the CLI measurement and that the second networkdevice plans to configure for the terminal device.

In a possible implementation, the second network device receives a thirdmessage from the first network device, and the third message is used toquery whether the first network device is allowed to configure the CLImeasurement for the terminal device. In this way, the first networkdevice can actively query whether the first network device may configurethe CLI measurement for the terminal device.

According to a third aspect, this application provides a method forconfiguring CLI measurement. The method includes: A first network devicesends a fourth message to a second network device. The fourth message isused to notify the second network device that the first network devicestarts to configure CLI measurement, or is used to notify the secondnetwork device that the first network device configures the CLImeasurement for a terminal device, or is used to notify the secondnetwork device that the second network device is prohibited fromconfiguring the CLI measurement for the terminal device. The firstnetwork device configures the CLI measurement for the terminal device.The first network device sends a fifth message to the second networkdevice. The fifth message is used to indicate that the first networkdevice ends the configured CLI measurement.

Based on this solution, the first network device sends the fourthmessage to the second network device, so that that only one networkdevice configures the CLI measurement for the terminal device can beimplemented. In other words, based on this solution, the terminal devicereceives the CLI measurement configured by the only one network devicefor the terminal device. In this way, this helps avoid a case in whichwhen the first network device and the second network device configurethe CLI measurement for the terminal device, a limit of CLI measurementthat the terminal device needs to perform is exceeded, so that theterminal device can still normally perform the CLI measurement in ascenario in which the terminal device is connected to the first networkdevice and the second network device at the same time. Further, in thissolution, the CLI measurement does not need to be negotiated between thefirst network device and the second network device, thereby helpingreduce interaction between the first network device and the secondnetwork device.

According to a fourth aspect, this application provides a method forconfiguring CLI measurement. The method includes: A terminal devicesends first capability information to a first network device, and sendssecond capability information to a second network device. The firstcapability information is determined by the terminal device for thefirst network device, and the second capability information isdetermined by the terminal device for the second network device.

Based on this solution, the first network device may configure CLImeasurement for the terminal device based on the first capabilityinformation. The second network device may configure CLI measurement forthe terminal device based on the second capability information. Forexample, the first network device and the second network device mayseparately configure a quantity of resources of the CLI measurement forthe terminal device, or separately configure configuration informationof the CLI measurement for the terminal device.

A sum of the first capability information and the second capabilityinformation does not exceed total capability information supported bythe terminal device.

In a possible implementation, the first capability information includesa first quantity, determined for the first network device, of resourcesof the CLI measurement, and the second capability information includes asecond quantity, determined for the second network device, of resourcesof the CLI measurement. A sum of the first quantity and the secondquantity is less than or equal to a maximum quantity, supported by theterminal device, of resources of the CLI measurement.

In another possible implementation, the first capability informationincludes a third quantity, determined for the first network device, ofresources of the CLI measurement in each unit time, and the secondcapability information includes a fourth quantity, determined for thesecond network device, of resources of the CLI measurement in each unittime. A sum of the third quantity and the fourth quantity is less thanor equal to a maximum quantity, supported by the terminal device, ofresources of the CLI measurement in each unit time.

In a possible implementation, the resource includes a sounding referencesignal SRS resource or a received signal strength indicator RSSIresource.

According to a fifth aspect, this application provides a communicationsapparatus. The communications apparatus has a function of implementingthe first network device in the first aspect, the second network devicein the second aspect, the first network device in the third aspect, orthe terminal device in the fourth aspect. The function may beimplemented by hardware, or may be implemented by hardware by executingcorresponding software. The hardware or the software includes one ormore units or modules corresponding to the function.

In a possible implementation, the communications apparatus may be anetwork device, or may be a component that may be used in a networkdevice, for example, a chip, a chip system, or a circuit. In this case,the communications apparatus may include a transceiver and a processor.The processor may be configured to support the communications apparatusin performing a corresponding function of the network device describedabove. The transceiver is configured to support the communicationsapparatus in communicating with another network device, a terminaldevice, and the like. The transceiver may be an independent receiver, anindependent transmitter, a transceiver having both a sending functionand a receiving function, or an interface circuit. Optionally, thecommunications apparatus may further include a memory. The memory may becoupled to the processor, and the memory stores a program instructionand data that are necessary for the communications apparatus.

In another possible implementation, the communications apparatus may bea terminal device, or may be a component that may be used in a terminaldevice, for example, a chip, a chip system, or a circuit. In this case,the communications apparatus may include a transceiver and a processor.Further, the processor may be configured to support the communicationsapparatus in performing a corresponding function of the terminal devicedescribed above. The transceiver is configured to support thecommunications apparatus in communicating with a network device, anotherterminal device, and the like. The transceiver may be an independentreceiver, an independent transmitter, a transceiver having both asending function and a receiving function, or an interface circuit.Optionally, the communications apparatus may further include a memory.The memory may be coupled to the processor, and the memory stores aprogram instruction and data that are necessary for the communicationsapparatus.

According to a sixth aspect, this application provides a communicationsapparatus, configured to implement the method in any one of the firstaspect or the possible implementations of the first aspect, orconfigured to implement the method in any one of the second aspect orthe possible implementations of the second aspect, or configured toimplement the method in any one of the third aspect or the possibleimplementations of the third aspect, or configured to implement themethod in any one of the fourth aspect or the possible implementationsof the fourth aspect. The communications apparatus includescorresponding function modules, respectively configured to implementsteps in the foregoing methods. A function may be implemented byhardware, or may be implemented by hardware by executing correspondingsoftware. The hardware or software includes one or more modulescorresponding to the function.

In a possible implementation, the communications apparatus may be anetwork device, and the communications apparatus may include aprocessing unit and a transceiver unit. These units may performcorresponding functions of the first network device or the secondnetwork device in the foregoing method examples. For details, refer tothe detailed descriptions in the method examples. Details are notdescribed herein again.

In another possible implementation, the communications apparatus may bea terminal device, and the communications apparatus may include aprocessing unit and a transceiver unit. These units may performcorresponding functions of the terminal device in the foregoing methodexamples. For details, refer to the detailed descriptions in the methodexamples. Details are not described herein again.

According to a seventh aspect, this application provides acommunications system. The communications system includes a terminaldevice, a first network device, and a second network device. The firstnetwork device may be configured to perform the method in any one of thefirst aspect or the possible implementations of the first aspect, andthe second network device is configured to perform the method in any oneof the second aspect or the possible implementations of the secondaspect.

According to an eighth aspect, this application provides acomputer-readable storage medium. The computer-readable storage mediumstores a computer program or an instruction, and when the computerprogram or the instruction is executed by a communications apparatus,the communications apparatus is enabled to perform the method in any oneof the first aspect or the possible implementations of the first aspect,or the communications apparatus is enabled to perform the method in anyone of the second aspect or the possible implementations of the secondaspect, or the communications apparatus is enabled to perform the methodin any one of the third aspect or the possible implementations of thethird aspect, or the communications apparatus is enabled to perform themethod in any one of the fourth aspect or the possible implementationsof the fourth aspect.

According to a ninth aspect, this application provides a computerprogram product. The computer program product includes a computerprogram or an instruction, and when the computer program or theinstruction is executed by a communications apparatus, the method in anyone of the first aspect or the possible implementations of the firstaspect is implemented, or the method in any one of the second aspect orthe possible implementations of the second aspect is implemented, or thecommunications apparatus is enabled to perform the method in any one ofthe third aspect or the possible implementations of the third aspect, orthe communications apparatus is enabled to perform the method in any oneof the fourth aspect or the possible implementations of the fourthaspect.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a network architecture in which CLIinterference may be caused in the current technology;

FIG. 2 is a schematic architectural diagram of a communications systemaccording to this application;

FIG. 3 is a schematic architectural diagram of a communications systemin an application scenario according to this application;

FIG. 4a is a schematic diagram of an E-UTRA-NR dual connectivity (EN-DC)architecture according to this application;

FIG. 4b is a schematic diagram of an NGEN-DC architecture according tothis application;

FIG. 4c is a schematic diagram of an NE-DC architecture according tothis application;

FIG. 4d is a schematic diagram of an NR-DC architecture according tothis application;

FIG. 5 is a schematic flowchart of a method for configuring CLImeasurement according to this application;

FIG. 6 is a schematic flowchart of another method for configuring CLImeasurement according to this application;

FIG. 7 is a schematic flowchart of still another method for configuringCLI measurement according to this application;

FIG. 8 is a schematic flowchart of yet another method for configuringCLI measurement according to this application;

FIG. 9 is a schematic structural diagram of a communications apparatusaccording to this application;

FIG. 10 is a schematic structural diagram of a communications apparatusaccording to this application;

FIG. 11 is a schematic structural diagram of a network device accordingto this application; and

FIG. 12 is a schematic structural diagram of a terminal device accordingto this application.

DESCRIPTION OF EMBODIMENTS

The following describes in detail this application with reference to theaccompanying drawings.

FIG. 2 is a schematic architectural diagram of a communications systemto which this application is applicable. As shown in FIG. 2, thecommunications system may include a network device 201, a terminaldevice 202, and a core network device 203. The terminal device 202communicates with the network device 201 in a wireless manner, thenetwork device 201 communicates with the core network device 201 in awireless or wired manner, and terminal devices 202 communicate with eachother in a wireless manner, for example, communicate with each otherthrough a sidelink (SL) air interface. The core network device 203 andthe network device 201 may be different physical devices independent ofeach other, or functions of the core network device 201 and logicalfunctions of the network device 201 may be integrated into a samephysical device, or a part of functions of the core network device 203and a part of functions of the network device 201 may be integrated intoone physical device. The terminal device 202 may be at a fixed location,or may be mobile. FIG. 2 is only a schematic diagram. The communicationssystem may further include another network device, for example, mayfurther include a wireless relay device and a wireless backhaul device,which are not shown in FIG. 2. Quantities of core network devices,network devices, and terminal devices included in the communicationssystem are not limited in this application.

The network device is an access device used by the terminal device toaccess the communications system in a wireless manner, and may be a basestation, an evolved NodeB (eNodeB), a transmission reception point(TRP), a next generation NodeB (gNB) in a 5G communications system, abase station in a future communications system, an access node in awireless fidelity (WiFi) system, or the like; or may be a module or aunit that completes a part of functions of the base station, forexample, may be a central unit (CU), or may be a distributed unit (DU).A specific technology and a specific device form that are used by thenetwork device are not limited in embodiments of this application.

The terminal device may also be referred to as a terminal, userequipment (UE), a mobile station, a mobile terminal, or the like. Theterminal device may be a mobile phone, a tablet computer, a computerhaving a wireless transceiver function, a virtual reality terminaldevice, an augmented reality terminal device, a wireless terminal inindustrial control, a wireless terminal in self driving, a wirelessterminal in remote surgery, a wireless terminal in a smart grid, awireless terminal in transportation safety, a wireless terminal in asmart city, a wireless terminal in a smart home, or the like. A specifictechnology and a specific device form that are used by the terminaldevice are not limited in this application.

The network device and the terminal device may be deployed on land,including an indoor or outdoor device, a handheld device, or avehicle-mounted device; may be deployed on a water surface; or may bedeployed on aircraft, balloons, and artificial satellites in the air.Application scenarios of the network device and the terminal device arenot limited in this application.

The network device and the terminal device may communicate with eachother by using a licensed spectrum, or may communicate with each otherby using an unlicensed spectrum, or may communicate with each other byusing both a licensed spectrum and an unlicensed spectrum. The networkdevice and the terminal device may communicate with each other by usinga sub-6 gigahertz (GHz) spectrum, or may communicate with each other byusing a spectrum above 6 GHz, or may communicate with each other byusing both a sub-6 GHz spectrum and a spectrum above 6 GHz. A spectrumresource used between the network device and the terminal device is notlimited in this application.

Based on the architecture of the communications system shown in FIG. 2,the following describes a possible application scenario provided in thisapplication, namely, a multi-radio dual connectivity (MR-DC) applicationscenario. MR-DC means that a multi-transmit antenna/multi-receiveantenna terminal device uses, at the same time, resources (for example,time-frequency resources) provided by two nodes (for example, networkdevices). In other words, one terminal device is connected to two nodes(for example, network devices) at the same time. Referring to FIG. 3,one node is used as a master node (MN), the other node is used as asecondary node (SN), and the MN is connected to the SN through a networkinterface.

Based on an MN type, an SN type, and different core networks connectedto the MN, the MR-DC may be classified into the following four types:

Type 1: evolved universal terrestrial radio access network and NR dualconnectivity (E-UTRA-NR dual connectivity, EN-DC) (which is alsoreferred to as E-UTRA-NR DC).

FIG. 4a is a schematic diagram of an EN-DC architecture according tothis application. In this architecture, a master node may be a long termevolution (LTE) eNB, and a secondary node is a new radio (NR) en-gNB.The LTE eNB and the NR en-gNB may be connected to a mobility managementnetwork element (MME) or a serving gateway (SGW) in a 4th generationmobile communication technology (4G) core network through an Siinterface, and the LTE eNB and the en-gNB may be connected through an X2interface.

Type 2: next generation-radio access network evolved universalterrestrial radio access network and NR dual connectivity (nextgeneration-radio access network E-UTRA-NR dual connectivity, NGEN-DC).

FIG. 4b is a schematic diagram of an NGEN-DC architecture according tothis application. In this architecture, a master node is an ng-eNB, asecondary node is an NR gNB, and the ng-eNB may also be referred to asan anchor base station. The ng-eNB and the NR gNB are connected to anaccess and mobility management function (AMF) network element or a userplane function (UPF) network element in a 5th generation (5G) corenetwork through an NG interface, and the NR gNB and the ng-eNB may beconnected through an Xn interface.

Type 3: NE-DC (which is also referred to as NR-E-UTRA DC).

FIG. 4c is a schematic diagram of an NE-DC architecture according tothis application. In this architecture, a master node is an NR gNB, anda secondary node is an ng-eNB. The NR gNB and the ng-eNB are connectedto an AMF network element or a UPF network element in a 5G core networkthrough an NG interface, and the NR gNB and the ng-eNB may be connectedthrough an Xn interface.

Type 4: NR-DC (which is also referred to as NR-NR DC).

FIG. 4d is a schematic diagram of an NR-DC architecture according tothis application. In this architecture, a master node is an NR gNB, anda secondary node is an NR gNB. The NR gNBs are connected to an AMFnetwork element or a UPF network element in a 5G core network through anNG interface, and the NR gNBs may be connected through an Xn interface.

It should be noted that network architectures and application scenariosdescribed in this application are intended to describe the technicalsolutions in this application more clearly, but are not intended tolimit the technical solutions provided in this application. A person ofordinary skill in the art may know that as the network architecturesevolve and a new service scenario emerges, the technical solutionsprovided in this application are also applicable to a similar technicalproblem.

In the following, some terms in this application are described to help aperson skilled in the art have a better understanding.

1. Reference signal received power (RSRP)

The RSRP is a power value of a reference signal received in a unit time(for example, a symbol) on all resource elements (RE) that carry thereference signal.

2. Received signal strength indicator (RSSI)

The RSSI is a total power value of received signals, including both apower value of a wanted signal or a reference signal and a power valueof interference, thermal noise, and the like.

3. Cross-link interference

When TDD uplink/downlink patterns (TDD UL/DL pattern) of neighboringcells are different, data sent in a cell may cause interference to datareceived in another cell. This type of interference is referred to ascross-link interference (CLI).

4. Cross-link interference measurement (CLI measurement)

A network device configures CLI measurement for a terminal device. Theterminal device measures a configured reference signal (for example, aninterference source), and then reports a CLI measurement result (forexample, an interference strength) to the network device. The networkdevice may coordinate scheduling based on the CLI measurement resultreported by the terminal device, to avoid or reduce the CLI as much aspossible.

5. CLI measurement type

The CLI measurement may be classified into the following two types basedon different types of reference signals (namely, resources) of the CLImeasurement. (1) CLI sounding reference signal reference signal receivedpower (SRS-RSRP) measurement: In this type of CLI measurement, areference signal is an SRS resource. The terminal device measures an SRSresource sent by one or more terminal devices (namely, aggressorterminal devices) that cause interference, to obtain an RSRP result ofeach SRS resource. That is, the terminal device may separately obtain aninterference strength of each interference source through measurement.(2) CLI RSSI measurement: In this type of CLI measurement, a referencesignal is an RSSI resource. The terminal device measures a totalreceived power value on a configured RSSI resource. The network devicedetermines, by using the total received power value obtained through themeasurement of the terminal device, an overall interference status ofthe terminal device.

To ensure that the CLI measurement does not bring relatively heavyburden to the terminal device, some limitations are defined for the CLImeasurement, which may be classified into the following two aspects: (a)A total quantity of resources of the CLI measurement that need to beperformed by the terminal device. For example, a total quantity of CLISRS resources that need to be measured by the terminal device is 32.That is, a maximum quantity of CLI SRS resources that need to bemeasured by the terminal device is 32. For another example, a totalquantity of CLI RSSI resources that need to be measured by the terminaldevice is 64. That is, a maximum quantity of CLI RSSI resources thatneed to be measured by the terminal device is 64. (b) A quantity ofresources of the CLI measurement that need to be performed by theterminal device in one slot. For example, a maximum quantity of CLI SRSresources that need to be measured by the terminal device in one slot is8.

With reference to the foregoing MR-DC scenario, one terminal device isconnected to two network devices at the same time. That is, one terminaldevice is connected to the MN and the SN. When both the MN and the SNconfigure CLI measurement for the terminal device, the CLI measurementconfigured by the MN and the SN for the terminal device may exceed aspecified limit of the CLI measurement. For example, a total quantity ofSRS resources that need to be measured by the terminal device is 32, CLImeasurement configured by the MN for the terminal device includes 20 SRSresources, the SN also configures CLI measurement for the terminaldevice, and the configured CLI measurement includes 15 SRS resources. Inthis case, the terminal device receives a quantity of resourcesconfigured by the SN and a quantity of resources configured by the MN,and a sum of the quantities is 15+20=35, which exceeds the totalquantity 32 of SRS resources that need to be measured by the terminaldevice. Consequently, the terminal device cannot normally perform theCLI measurement.

In view of this, a method for configuring CLI measurement provided inthis application is proposed. In the following description, the methodfor configuring CLI measurement may be used in the network architectureshown in any one of the accompanying drawings FIG. 2 to FIG. 4d . In apossible case, a first network device may be the MN in FIG. 3, and asecond network device is the SN in FIG. 3. In this case, the firstnetwork device may be the LTE eNB in FIG. 4a , and the second networkdevice may be the NR gNB in FIG. 4a . Alternatively, the first networkdevice may be the ng-eNB in FIG. 4b , and the second network device maybe the NR gNB in FIG. 4b . Alternatively, the first network device isthe NR gNB in FIG. 4c , and the second network device is the ng-eNB inFIG. 4c . Alternatively, the first network device is the NR gNB in FIG.4d , and the second network device is the other NR gNB in FIG. 4d . Inanother possible case, a first network device may be the SN in FIG. 3,and a second network device is the MN in FIG. 3. In this case, the firstnetwork device may be the NR gNB in FIG. 4a , and the second networkdevice may be the LTE eNB in FIG. 4a . Alternatively, the first networkdevice may be the NR gNB in FIG. 4b , and the second network device maybe the ng-eNB in FIG. 4b . Alternatively, the first network device isthe ng-eNB in FIG. 4c , and the second network device is the NR gNB inFIG. 4c . Alternatively, the first network device is the NR gNB in FIG.4d , and the second network device is the other NR gNB in FIG. 4d . Theterminal device may be the terminal device 202 shown in FIG. 2, or maybe the terminal device shown in FIG. 3.

FIG. 5 is a schematic flowchart of a method for configuring CLImeasurement according to this application. The method includes thefollowing steps.

Step 501: A second network device sends a first message to a firstnetwork device, where the first message is used to indicate informationabout CLI measurement.

Correspondingly, the first network device receives the first messagefrom the second network device.

In this application, the information about the CLI measurement mayinclude a quantity of resources of the CLI measurement or configurationinformation of a resource for the CLI measurement. An example in whichthe information about the CLI measurement is a quantity of resources ofthe CLI measurement or the information about the CLI measurement isconfiguration information of the CLI measurement is used below fordescription.

Case 1: The information about the CLI measurement includes a quantity ofresources of the CLI measurement.

Herein, the resource of the CLI measurement includes a time-frequencyresource. The resource of the CLI measurement is, for example, a CLI SRSresource or a CLI-RSSI resource.

The first message may be used to indicate a quantity of resources of theCLI measurement that are configured by the second network device for aterminal device. In other words, the second network device may notifythe first network device of the quantity of resources of the CLImeasurement that are configured by the second network device for theterminal device.

Alternatively, the first message may be used to indicate a maximumquantity of resources that are of the CLI measurement and that the firstnetwork device is allowed to configure for the terminal device. In otherwords, the second network device may notify the first network device ofthe maximum quantity of resources that are of the CLI measurement andthat the first network device is allowed to configure for the terminaldevice.

Alternatively, the first message may be used to indicate a quantity ofresources of the CLI measurement that are configured by the secondnetwork device for the terminal device in a unit time. In other words,the second network device may notify the first network device of thequantity of resources of the CLI measurement that are configured by thesecond network device for the terminal device in each unit time. Theunit time may be a slot, a symbol, a subframe, a half-frame, a frame, orthe like.

Alternatively, the first message may be used to indicate a maximumquantity of resources that are of the CLI measurement and that the firstnetwork device is allowed to configure for the terminal device in a unittime. In other words, the second network device may notify the firstnetwork device of the maximum quantity of resources that are of the CLImeasurement and that the first network device is allowed to configurefor the terminal device in each unit time. The unit time may be a slot.

Case 2: The information about the CLI measurement includes configurationinformation (information element, IE) of a resource of the CLImeasurement.

For example, the configuration information of the resource of the CLImeasurement includes time domain configuration information of theresource, frequency domain configuration information of the resource, aperiodicity of the resource, an identifier of the resource, and thelike.

Herein, the first message is used to indicate configuration informationof a resource that is of the CLI measurement and that the second networkdevice plans to configure for the terminal device.

In a possible implementation, a type of the first message sent by thesecond network device to the first network device may be an X2/Xnmessage. Further, optionally, when the second network device is an MN,and the first network device is an SN, the X2/Xn message may be aCG-ConfigInfo message; or when the second network device is an SN, andthe first network device is an MN, the X2/Xn message may be a CG-Configmessage.

Step 502: The first network device may configure the CLI measurement forthe terminal device based on the first message.

In a possible implementation, after the first network device receivesthe first message, the first network device may send a second message tothe second network device (refer to step 503 in FIG. 5) if determiningthat the quantity, indicated by using the first message, of resources ofthe CLI measurement does not meet a first threshold. The second messageis used to notify the second network device to adjust the quantity ofresources of the CLI measurement that are configured for the terminaldevice, or the second message is used to notify the second networkdevice to adjust the quantity of resources that are of the CLImeasurement and that the first network device is allowed to configurefor the terminal device.

Herein, the following four cases are described in detail based oncontent indicated by using the first message.

Case A: The first message is used to indicate a quantity of resources ofthe CLI measurement that are configured by the second network device forthe terminal device.

In a possible implementation, the first network device may configure aquantity of resources of the CLI measurement for the terminal devicebased on the first message and a total quantity of resources of the CLImeasurement that need to be performed by the terminal device. Forexample, the first message is used to indicate that a quantity of CLISRS resources configured by the second network device for the terminaldevice is 10. The first network device may determine, based on the firstmessage and a total quantity 32 of CLI SRS resources that need to bemeasured by the terminal device, that a quantity of CLI SRS resourcesconfigured for the terminal device is 32−10=22. The first network devicemay configure less than or equal to 22 CLI SRS resources for theterminal device. For another example, the first message is used toindicate that a quantity of CLI RSSI resources configured by the secondnetwork device for the terminal device is 15. The first network devicemay determine, based on the first message and a total quantity 64 of CLIRSSI resources that need to be measured by the terminal device, that aquantity of CLI RSSI resources configured for the terminal device is64−15=49. The first network device may configure less than or equal to49 CLI RSSI resources for the terminal device.

Based on the case A, if it is determined that the quantity, indicated byusing the first message, of resources is greater than the firstthreshold, it indicates that the quantity of resources of the CLImeasurement that are configured by the second network device for theterminal device is relatively large. It is possible that the firstnetwork device cannot normally configure the resource of the CLImeasurement for the terminal device. The first network device may sendthe second message to the second network device, and the second messageis used to notify the second network device to adjust the quantity ofresources of the CLI measurement that are configured for the terminaldevice. In a possible implementation, after receiving the secondmessage, the second network device adjusts the quantity of resources ofthe CLI measurement that are configured by the second network device forthe terminal device. Further, optionally, after adjusting the quantityof resources of the CLI measurement that are configured for the terminaldevice, the second network device may resend the first message to thefirst network device. In this case, the quantity, indicated by using thefirst message, of resources of the CLI measurement that are configuredby the second network device for the terminal device is a quantityadjusted by the second network device.

Case B: The first message is used to indicate a maximum quantity ofresources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device.

In a possible implementation, the first network device may determine,based on the first message, a maximum quantity of resources of the CLImeasurement that are configured for the terminal device. For example,the first message is used to indicate that a quantity of CLI SRSresources that the first network device is allowed to configure for theterminal device is 10, and a quantity of CLI SRS resources that thefirst network device may configure for the terminal device is less thanor equal to 10. For another example, the first message is used toindicate that a quantity of CLI RSSI resources that the first networkdevice is allowed to configure for the terminal device is 15, and aquantity of CLI RSSI resources that the first network device mayconfigure for the terminal device is less than or equal to 15.

Based on the case B, if it is determined that the quantity, indicated byusing the first message, of resources of the CLI measurement is lessthan the first threshold, it indicates that the quantity of resourcesthat are of the CLI measurement and that the first network device isallowed to configure is relatively small. It is possible that the firstnetwork device cannot normally configure the resource of the CLImeasurement for the terminal device. The first network device sends thesecond message to the second network device, and the second message isused to notify the second network device to adjust the maximum quantityof resources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device. In a possibleimplementation, the second network device may adjust, based on thesecond message, the maximum quantity of resources that are of the CLImeasurement and that the first network device is allowed to configurefor the terminal device. Further, optionally, after adjusting themaximum quantity of resources that are of the CLI measurement and thatthe first network device is allowed to configure for the terminaldevice, the second network device may resend the first message to thefirst network device. In this case, the maximum quantity, indicated byusing the first message, of resources that are of the CLI measurementand that the first network device is allowed to configure for theterminal device is a quantity adjusted by the second network device.

Case C: The first message may be used to indicate a quantity ofresources of the CLI measurement that are configured by the secondnetwork device for the terminal device in each unit time. In the case C,an example in which a unit time is one slot is used for description.

In a possible implementation, the first network device may configure,based on the first message and a maximum quantity of resources of theCLI measurement that need to be performed by the terminal device in oneslot, a quantity of resources of the CLI measurement for the terminaldevice. For example, the first message is used to indicate that aquantity of CLI SRS resources configured by the second network devicefor the terminal device in one slot is 6. The first network device mayconfigure, based on the first message and a maximum quantity 8 of CLISRS resources that need to be measured by the terminal device in oneslot, less than or equal to 8−6=2 CLI SRS resources for the terminaldevice in one slot.

Based on the case C, if it is determined that the quantity, indicated byusing the first message, of resources is greater than a third threshold,it indicates that the quantity of resources of the CLI measurement thatare configured by the second network device for the terminal device ineach unit time is relatively large. It is possible that the firstnetwork device cannot normally configure the resource of the CLImeasurement for the terminal device. The first network device may sendthe second message to the second network device, and the second messageis used to notify the second network device to adjust the quantity ofresources of the CLI measurement that are configured for the terminaldevice in each unit time. In a possible implementation, after receivingthe second message, the second network device adjusts the quantity ofresources of the CLI measurement that are configured by the secondnetwork device for the terminal device in each unit time. Further,optionally, after adjusting the quantity of resources of the CLImeasurement that are configured for the terminal device in each unittime, the second network device may resend the first message to thefirst network device. In this case, the quantity, indicated by using thefirst message, of resources of the CLI measurement that are configuredby the second network device for the terminal device in each unit timeis a quantity adjusted by the second network device.

Case D: The first message may be used to indicate a maximum quantity ofresources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device in each unittime. In the case D, an example in which a unit time is one slot is usedfor description.

In a possible implementation, the first network device may configure,based on the first message and a maximum quantity of resources of theCLI measurement that need to be performed by the terminal device in oneslot, a quantity of resources of the CLI measurement for the terminaldevice. For example, the first message is used to indicate that aquantity of CLI SRS resources that the first network device is allowedto configure for the terminal device in one slot is 6, and the firstnetwork device determines that less than or equal to 6 CLI SRS resourcesmay be configured for the terminal device in one slot.

Based on the case D, if it is determined that the quantity, indicated byusing the first message, of resources of the CLI measurement is lessthan a fourth threshold, it indicates that the quantity of resourcesthat are of the CLI measurement and that the first network device isallowed to configure in each unit time is relatively small. It ispossible that the first network device cannot normally configure theresource of the CLI measurement for the terminal device. The firstnetwork device sends the second message to the second network device,and the second message is used to notify the second network device toadjust the maximum quantity of resources that are of the CLI measurementand that the first network device is allowed to configure for theterminal device in each unit time. In a possible implementation, thesecond network device may adjust, based on the second message, themaximum quantity of resources that are of the CLI measurement and thatthe first network device is allowed to configure for the terminal devicein each unit time. Further, optionally, after adjusting the maximumquantity of resources that are of the CLI measurement and that the firstnetwork device is allowed to configure for the terminal device in eachunit time, the second network device may resend the first message to thefirst network device. In this case, the maximum quantity, indicated byusing the first message, of resources that are of the CLI measurementand that the first network device is allowed to configure for theterminal device in each unit time is a quantity adjusted by the secondnetwork device.

Based on the case 2, after receiving the first message, the firstnetwork device determines, based on the configuration information of theresource that is of the CLI measurement and that the second networkdevice plans to configure for the terminal device, a quantity ofresources that are of the CLI measurement and that the second networkdevice plans to configure for the terminal device. Then, the firstnetwork device determines a sum of a quantity of resources that are ofthe CLI measurement and that the first network device plans to configurefor the terminal device and the quantity of resources that are of theCLI measurement and that the second network device plans to configurefor the terminal device. The first network device needs, if the sum isgreater than a second threshold, to adjust configuration information ofa resource that is of the CLI measurement and that the first networkdevice plans to configure for the terminal device. The second thresholdmay be a maximum quantity of resources of the CLI measurement. Forexample, a total quantity of CLI SRS resources that need to be measuredby the terminal device is 32. For another example, a total quantity ofCLI RSSI resources that need to be measured by the terminal device is64. Alternatively, the second threshold may be a maximum quantity ofresources of the CLI measurement in a unit time. For example, a maximumquantity of CLI SRS resources that need to be measured by the terminaldevice in one slot is 8. Alternatively, the second threshold may be amaximum quantity, supported by the terminal device, of resources of theCLI measurement. Alternatively, the second threshold may be a maximumquantity, supported by the terminal device, of resources of the CLImeasurement in a unit time.

It can be learned from step 501 and step 502 that the first networkdevice and the second network device negotiate information about CLImeasurement that is separately configured for the terminal device, sothat the first network device and the second network device can properlyconfigure the information about the CLI measurement for the terminaldevice. This helps avoid a case in which when the first network deviceand the second network device configure the CLI measurement for theterminal device, a limit of CLI measurement that the terminal deviceneeds to perform is exceeded, so that the terminal device can stillnormally perform the CLI measurement in a scenario in which the terminaldevice is connected to the first network device and the second networkdevice at the same time.

In this application, when one terminal device is connected to twonetwork devices, the two network devices may negotiate with each other,so that only one network device configures CLI measurement for theterminal device. FIG. 6 is a schematic flowchart of another method forconfiguring CLI measurement according to this application. The methodincludes the following steps.

Step 601: A second network device sends a first message to a firstnetwork device. Correspondingly, the first network device receives thefirst message from the second network device.

Herein, the first message is used to indicate that the second networkdevice configures CLI measurement for a terminal device. In other words,the first message is used to indicate that the second network deviceconfigures the CLI measurement for the terminal device and that thefirst network device cannot configure the CLI measurement for theterminal device.

Alternatively, the first message is used to indicate that the firstnetwork device is allowed to configure CLI measurement for the terminaldevice. It may also be understood as that the first message is used toindicate that the first network device is allowed to configure the CLImeasurement for the terminal device and that the second network deviceis not allowed to configure the CLI measurement for the terminal device.

Alternatively, the first message is used to indicate the first networkdevice to configure CLI measurement for the terminal device. In otherwords, the first message is used to indicate the first network device toconfigure the CLI measurement for the terminal device and indicate thatthe second network device does not configure the CLI measurement for theterminal device.

Step 602: The first network device determines, based on the firstmessage, whether to configure the CLI measurement for the terminaldevice.

Herein, there may be the following three cases based on contentindicated by using the first message.

Case 1: The first message is used to indicate that the second networkdevice configures CLI measurement for the terminal device.

Based on the case 1, the first network device may determine, based onthe first message, that the second network device configures the CLImeasurement for the terminal device, and the first network devicedetermines that the first network device cannot configure the CLImeasurement for the terminal device.

Case 2: The first message is used to indicate that the first networkdevice is allowed to configure CLI measurement for the terminal device.

Based on the case 2, the first network device may determine, based onthe first message, that the first network device is allowed to configurethe CLI measurement for the terminal device. In the case 2, the firstnetwork device may configure the CLI measurement for the terminaldevice, or may not configure the CLI measurement for the terminaldevice. In other words, in the case 2, whether the first network deviceconfigures the CLI measurement for the terminal device may beautonomously determined by the first network device.

Case 3: The first message is used to indicate the first network deviceto configure CLI measurement for the terminal device.

In other words, the second network device may directly indicate thefirst network device to configure the CLI measurement for the terminaldevice, that is, indicate that the first network device needs toconfigure the CLI measurement for the terminal device.

Further, optionally, the first message may further indicate that onlyone network device configures the CLI measurement for the terminaldevice within preset duration. In other words, the first message mayindicate that the first network device or the second network deviceconfigures the CLI measurement for the terminal device within the presetduration.

In this application, the first network device may alternatively activelysend a third message to the second network device (refer to step 603 inFIG. 6), and the third message is used to query whether the firstnetwork device is allowed to configure the CLI measurement for theterminal device. After receiving the third message, the second networkdevice sends the first message to the first network device, to notifythe first network device whether the first network device is allowed toconfigure the CLI measurement for the terminal device. When the firstnetwork device needs to configure the CLI measurement for the terminaldevice, the first network device actively sends the third message to thesecond network device, and there is no need to wait for the secondnetwork device to send the first message.

It should be noted that, configuring the CLI measurement for theterminal device includes configuring, for the terminal device,configuration information of a measurement object of the CLI measurement(for example, configuration information of a resource of the CLImeasurement), reporting configuration information of the CLImeasurement, and configuration information (namely, filteringconfiguration) of a measurement quantity for the CLI measurement.

It can be learned from step 601 and step 602 that, through negotiationbetween the first network device and the second network device, thatonly one network device configures the CLI measurement for the terminaldevice can be implemented. In other words, based on this solution, theterminal device receives the CLI measurement configured by the only onenetwork device for the terminal device. In this way, this helps avoid acase in which when the first network device and the second networkdevice configure the CLI measurement for the terminal device, a limit ofCLI measurement that the terminal device needs to perform is exceeded,so that the terminal device can still normally perform the CLImeasurement in a scenario in which the terminal device is connected tothe first network device and the second network device at the same time.

It should be noted that, after the terminal device changes from beingserved by only one network device (the second network device) to beingserved by two network devices (the first network device and the secondnetwork device), the second network device in FIG. 6 may be used as anMN, and the first network device may be used as an SN.

FIG. 7 is a schematic flowchart of still another method for configuringCLI measurement according to this application. The method includes thefollowing steps.

Step 701: A first network device sends a fourth message to a secondnetwork device. Correspondingly, the second network device receives thefourth message from the first network device.

Herein, the fourth message is used to notify the second network devicethat the first network device starts to configure CLI measurement.Alternatively, the fourth message is used to notify the second networkdevice that the first network device configures the CLI measurement fora terminal device. Alternatively, the fourth message is used to notifythe second network device that the second network device is prohibitedfrom configuring the CLI measurement for the terminal device.

Step 702: The first network device configures the CLI measurement forthe terminal device.

Herein, the first network device may configure, for the terminal device,configuration information of a measurement object of the CLI measurement(for example, configuration information of a resource of the CLImeasurement), reporting configuration information of the CLImeasurement, and configuration information (namely, filteringconfiguration) of a measurement quantity for the CLI measurement.

Step 703: After ending the configured CLI measurement, the first networkdevice sends a fifth message to the second network device.Correspondingly, the second network device receives the fifth messagefrom the first network device.

Herein, the fifth message is used to indicate that the first networkdevice ends the configured CLI measurement, or it may be understood asthat the fifth message is used to notify the second network device thatno CLI measurement is currently configured for the terminal device. Itshould be understood that, that the first network device ends theconfigured CLI measurement means that the first network device removesthe CLI measurement configured for the terminal device.

In a possible implementation, after receiving the fourth message, thesecond network device may determine that the first network deviceconfigures the CLI measurement for the terminal device. In this case,the second network device does not configure the CLI measurement for theterminal device. After receiving the fifth message, the second networkdevice may determine that the first network device ends the configuredCLI measurement. In this case, the second network device may configurethe CLI measurement for the terminal device.

It can be learned from step 701 and step 703 that, the first networkdevice sends the fourth message to the second network device, so thatthat only one network device configures the CLI measurement for theterminal device can be implemented. In other words, based on thissolution, the terminal device receives the CLI measurement configured bythe only one network device for the terminal device. In this way, thishelps avoid a case in which when the first network device and the secondnetwork device configure the CLI measurement for the terminal device, alimit of CLI measurement that the terminal device needs to perform isexceeded, so that the terminal device can still normally perform the CLImeasurement in a scenario in which the terminal device is connected tothe first network device and the second network device at the same time.Further, in this solution, the CLI measurement does not need to benegotiated between the first network device and the second networkdevice, thereby helping reduce interaction between the first networkdevice and the second network device.

In this application, the terminal device may report capabilityinformation of the terminal device to a network device. When oneterminal device is connected to two network devices, the terminal devicemay properly plan capability information reported for the first networkdevice and the second network device, so that CLI measurement configuredby the first network device and the second network device for theterminal device does not exceed a total capability of the terminaldevice. FIG. 8 is a schematic flowchart of yet another method forconfiguring CLI measurement according to this application. The methodincludes the following steps.

Step 801: A terminal device sends first capability information to afirst network device, where the first capability information isdetermined by the terminal device for the first network device.Correspondingly, the first network device receives the first capabilityinformation from the terminal device.

Step 802: The terminal device sends second capability information to asecond network device, where the second capability information isdetermined by the terminal device for the second network device.Correspondingly, the second network device receives the secondcapability information from the terminal device.

Herein, a sum of the first capability information and the secondcapability information does not exceed total capability informationsupported by the terminal device.

Based on this solution, the first network device may configure CLImeasurement for the terminal device based on the first capabilityinformation. The second network device may configure CLI measurement forthe terminal device based on the second capability information. Forexample, the first network device and the second network device mayseparately configure a quantity of resources of the CLI measurement forthe terminal device, or separately configure configuration informationof the CLI measurement for the terminal device.

In a possible implementation, the first capability information includesa first quantity, determined for the first network device, of resourcesof the CLI measurement, and the second capability information includes asecond quantity, determined for the second network device, of resourcesof the CLI measurement. A sum of the first quantity and the secondquantity is less than or equal to a maximum quantity, supported by theterminal device, of resources of the CLI measurement.

For example, the first capability information includes a first quantity,supported by the terminal device, of CLI SRS resources, and the secondcapability information includes a second quantity, supported by theterminal device, of CLI SRS resources. Alternatively, the firstcapability information includes a first quantity, supported by theterminal device, of CLI RSSI resources, and the second capabilityinformation includes a second quantity, supported by the terminaldevice, of CLI RSSI resources.

With reference to FIG. 3, first capability information reported by theterminal device to an MN is a first quantity K1, supported by theterminal device, of CLI SRS resources, second capability informationreported by the terminal device to an SN is a second quantity K2,supported by the terminal device, of CLI SRS resources, and a totalquantity, supported by the terminal device, of CLI SRS resources is K,where K1+K2≤K.

Alternatively, first capability information reported by the terminaldevice to an MN is a first quantity L1, supported by the terminaldevice, of CLI RSSI resources, second capability information reported bythe terminal device to an SN is a second quantity L2, supported by theterminal device, of CLI RSSI resources, and a total quantity, supportedby the terminal device, of CLI RSSI resources is L, where L1+L2≤L.

In another possible implementation, the first capability informationincludes a third quantity, determined for the first network device, ofresources of the CLI measurement in each unit time, and the secondcapability information includes a fourth quantity, determined for thesecond network device, of resources of the CLI measurement in each unittime. A sum of the third quantity and the fourth quantity is less thanor equal to a maximum quantity, supported by the terminal device, ofresources of the CLI measurement in each unit time.

For example, the first capability information includes a third quantity,supported by the terminal device, of CLI SRS resources in each unittime, and the second capability information includes a fourth quantity,supported by the terminal device, of CLI SRS resources in each unittime. Alternatively, the first capability information includes a thirdquantity, supported by the terminal device, of CLI RSSI resources ineach unit time, and the second capability information includes a fourthquantity, supported by the terminal device, of CLI RSSI resources ineach unit time.

With reference to FIG. 3, first capability information reported by theterminal device to an MN is a third quantity M1, supported by theterminal device, of CLI SRS resources in each unit time, secondcapability information reported by the terminal device to an SN is afourth quantity M2, supported by the terminal device, of CLI SRSresources in each unit time, and a total quantity, supported by theterminal device, of CLI SRS resources in each unit time is M, whereM1+M2≤M.

Alternatively, first capability information reported by the terminaldevice to an MN is a first quantity N1, supported by the terminaldevice, of CLI RSSI resources in each unit time, second capabilityinformation reported by the terminal device to an SN is a secondquantity N2, supported by the terminal device, of CLI RSSI resources ineach unit time, and a total quantity, supported by the terminal device,of CLI RSSI resources is N, where N1+N2≤N.

It should be noted that there is no sequence between step 801 and step802, and step 801 may be performed before step 802. Alternatively, step802 may be performed before step 801. Alternatively, step 801 and step802 may be performed at the same time.

It can be learned from step 801 and step 802 that the terminal deviceproperly allocates capability information to the first network deviceand the second network device based on the supported total capabilityinformation, and the sum of the first capability information and thesecond capability information does not exceed the total capabilityinformation supported by the terminal device. In this way, the CLImeasurement that is configured by the first network device for theterminal device based on the first capability information and the CLImeasurement that is configured by the second network device for theterminal device based on the second capability information do not exceedthe total capability information supported by the terminal device.Therefore, the terminal device can still normally perform the CLImeasurement in a scenario in which the terminal device is connected tothe first network device and the second network device at the same time.Further, in this solution, the CLI measurement does not need to benegotiated between the first network device and the second networkdevice, thereby helping reduce interaction between the first networkdevice and the second network device.

In this application, a resource of the CLI measurement includes an SRSresource of the CLI measurement or an RSSI resource of the CLImeasurement.

It should be noted that content indicated by using each of the firstmessage, the second message, the third message, the fourth message, andthe fifth message in this application may be agreed on by the firstnetwork device and the second network device in advance, or may bepredefined in a protocol. This is not limited in this application.Herein, these messages each may be identified by using one index, or maybe identified by using information having one or more bits, or may beidentified in any other possible forms. This is not limited in thisapplication. In addition, content indicated by using each of the firstmessage, the second message, the third message, the fourth message, andthe fifth message may alternatively be indicated by using a field in themessage.

It may be understood that, to implement the functions in the foregoingembodiments, the network device includes a corresponding hardwarestructure and/or software module for performing each function. A personskilled in the art should easily be aware that, in combination with theexamples described in the embodiments disclosed in this application,units and method steps may be implemented by hardware or a combinationof hardware and computer software in this application. Whether afunction is performed by hardware or hardware driven by computersoftware depends on particular application scenarios and designconstraints of the technical solutions.

FIG. 9 and FIG. 10 each are a schematic structural diagram of a possiblecommunications apparatus according to this application. Thesecommunications apparatuses may be configured to implement a function ofthe first network device, the second network device, or the terminaldevice in the foregoing method embodiments, and therefore can alsoachieve beneficial effects of the foregoing method embodiments. In thisapplication, the communications apparatus may be the network device 201shown in FIG. 2, or may be a module (for example, a chip) used in thenetwork device, or may be the terminal device 202 shown in FIG. 2.

As shown in FIG. 9, the communications apparatus 900 includes aprocessing unit 901 and a transceiver unit 902. The communicationsapparatus 900 is configured to implement a function of the first networkdevice or the second network device in the method embodiment shown inFIG. 5, FIG. 6, FIG. 7, or FIG. 8.

When the communications apparatus 900 is configured to implement afunction of the first network device in the method embodiment shown inFIG. 5, the transceiver unit 902 is configured to receive a firstmessage from the second network device, where the first message is usedto indicate information about cross-link interference CLI measurement;and the processing unit 901 is configured to configure the CLImeasurement for the terminal device based on the first message.

When the communications apparatus 900 is configured to implement afunction of the second network device in the method embodiment shown inFIG. 5, the processing unit 901 is configured to determine a firstmessage, where the first message is used to indicate information aboutcross-link interference CLI measurement; and the transceiver unit 902 isconfigured to send the first message to the first network device.

For more detailed descriptions of the processing unit 901 and thetransceiver unit 902, directly refer to the related descriptions in themethod embodiment shown in FIG. 5, and details are not described hereinagain.

When the communications apparatus 900 is configured to implement afunction of the terminal device in the method embodiment shown in FIG.8, the transceiver unit 902 is configured to: send first capabilityinformation to the first network device, and send second capabilityinformation to the second network device, where the first capabilityinformation is determined by the processing unit 901 for the firstnetwork device, and the second capability information is determined bythe processing unit 901 for the second network device.

For more detailed descriptions of the processing unit 901 and thetransceiver unit 902, directly refer to the related descriptions in themethod embodiment shown in FIG. 5, and details are not described hereinagain.

It should be understood that the processing unit 901 in this embodimentof this application may be implemented by a processor or aprocessor-related circuit component, and the transceiver unit 902 may beimplemented by a transceiver or a transceiver-related circuit component.

Based on the foregoing content and a same concept, as shown in FIG. 10,this application further provides a communications apparatus 1000. Thecommunications apparatus 1000 may include a processor 1001 and atransceiver 1002. The processor 1001 and the transceiver 1002 arecoupled to each other. It may be understood that the transceiver 1002may be an interface circuit or an input/output interface. Optionally,the communications apparatus 1000 may further include a memory 1003,configured to: store an instruction executed by the processor 1001, orstore input data required by the processor 1001 to run an instruction,or store data generated after the processor 1001 runs an instruction.

When the communications apparatus 1000 is configured to implement themethod shown in FIG. 5, the processor 1001 is configured to perform afunction of the processing unit 901, and the transceiver 1002 isconfigured to perform a function of the transceiver unit 902.

When the communications apparatus is a chip used in a first networkdevice, the chip of the first network device implements a function ofthe first network device in the foregoing method embodiment. The chip ofthe first network device receives a message from another module (forexample, a radio frequency module or an antenna) in the first networkdevice, and the message is sent by a second network device to the firstnetwork device. Alternatively, the chip of the first network devicesends a message to another module (for example, a radio frequency moduleor an antenna) in the first network device, and the message is sent bythe first network device to a second network device.

When the communications apparatus is a chip used in a second networkdevice, the chip of the second network device implements a function ofthe second network device in the foregoing method embodiment. The chipof the second network device receives a message from another module (forexample, a radio frequency module or an antenna) in the second networkdevice, and the message is sent by a first network device to the secondnetwork device. Alternatively, the chip of the second network devicesends a message to another module (for example, a radio frequency moduleor an antenna) in the second network device, and the message is sent bythe second network device to a first network device.

When the communications apparatus is a network device, FIG. 11 is anexample of a schematic structural diagram of a network device 1100according to this application. As shown in FIG. 11, the network device1100 may include one or more radio frequency units, for example, aremote radio unit (RRU) 1102 and one or more baseband units (BBU) 1101.The RRU 1102 may be referred to as a transceiver unit, a transceiver, atransceiver circuit, a transceiver, or the like, and may include atleast one antenna 11021 and a radio frequency unit 11022. The RRU 1102is mainly configured to: send and receive a radio frequency signal andperform conversion between a radio frequency signal and a basebandsignal. The BBU 1101 may be referred to as a processing unit, aprocessor, or the like, is mainly configured to perform basebandprocessing, for example, channel coding, multiplexing, modulation, andfrequency spread, and is also configured to control the network device,and so on. The RRU 1102 and the BBU 1101 may be physically disposedtogether, or may be physically separated, that is, in a distributednetwork device.

The BBU 1101 is a control center of the base station, and may also bereferred to as a processing module. The BBU 1101 may correspond to theprocessing module 901 in FIG. 9, and is mainly configured to implement abaseband processing function, for example, channel coding, multiplexing,modulation, and frequency spread. For example, the BBU 1101 (theprocessing module) may be configured to control the base station toperform an operation procedure related to the network device in theforegoing method embodiment, for example, configure CLI measurement fora terminal device.

In an optional implementation, the BBU 1101 may include one or moreboards, and a plurality of boards may jointly support a radio accessnetwork (for example, an LTE network) having a single access standard,or may separately support radio access networks (for example, an LTEnetwork, a 5G network, or another network) having different accessstandards. The BBU 1101 further includes a memory 11012 and a processor11011. The memory 11012 is configured to store necessary instructionsand data. The processor 11011 is configured to control the networkdevice to perform a necessary action, for example, configured to controlthe network device to perform the method performed by the network devicein any one of the foregoing embodiments. The memory 11012 and theprocessor 11011 may serve the one or more boards. In other words, amemory and a processor may be separately disposed on each board.Alternatively, the plurality of boards may share a same memory and asame processor. In addition, a necessary circuit is further disposed oneach board.

On an uplink, an uplink signal (including data and the like) sent by theterminal device is received through the antenna 11021, and on adownlink, a downlink signal (including data and/or control information)is sent to the terminal device through the antenna 11021. The processor11011 processes service data and a signaling message based on a radioaccess technology (for example, an access technology in LTE, NR, andanother evolved system) used for a radio access network. The processor11011 is further configured to: control and manage an action of thenetwork device, and perform processing performed by the network devicein the foregoing embodiments. The processor 11011 is further configuredto support a first network device in performing the method performed bythe first network device in FIG. 5, or is further configured to supporta second network device in performing the method performed by the secondnetwork device in FIG. 5.

It should be noted that FIG. 11 shows only a simplified design of thenetwork device. In actual application, the network device may includeany quantity of antennas, memories, processors, radio frequency units,RRUs, BBUs, and the like, and all network devices that can implementthis application fall within the protection scope of this application.

It should be understood that the transceiver unit 1102 is configured toperform a sending operation and a receiving operation on a first networkdevice side in the method embodiment shown in FIG. 5, and the processingunit 1101 is configured to perform an operation other than thereceiving/sending operation on the first network device side in themethod embodiment shown in FIG. 5. For example, the transceiver unit1102 is configured to perform a receiving/sending operation on the firstnetwork device side in the embodiment shown in FIG. 5, for example, step501. The processing unit 1101 is configured to perform the operationother than the receiving/sending operation on the first network deviceside in the embodiment shown in FIG. 5, for example, step 502.

This application further provides a communications apparatus, and thecommunications apparatus may be a terminal device or a circuit. Thecommunications apparatus may be configured to perform an actionperformed by the terminal device in the foregoing method embodiments.

When the communications apparatus is a terminal device, FIG. 12 is asimplified schematic structural diagram of the terminal device. For easeof understanding and illustration, an example in which the terminaldevice is a mobile phone is used in FIG. 12. As shown in FIG. 12, theterminal device includes a processor, a memory, a radio frequencycircuit, an antenna, and an input/output apparatus. The processor ismainly configured to: process a communications protocol andcommunications data, control the terminal device, execute a softwareprogram, process data of the software program, and so on. The memory ismainly configured to store a software program and data. The radiofrequency circuit is mainly configured to: perform conversion between abaseband signal and a radio frequency signal, and process the radiofrequency signal. The antenna is mainly configured to send and receive aradio frequency signal in a form of an electromagnetic wave. Theinput/output apparatus, such as a touchscreen, a display screen, or akeyboard, is mainly configured to: receive data input by a user andoutput data to the user. It should be noted that some types of terminaldevices may have no input/output apparatus.

When data needs to be sent, after performing baseband processing on theto-be-sent data, the processor outputs a baseband signal to the radiofrequency circuit; and the radio frequency circuit performs radiofrequency processing on the baseband signal and then sends a radiofrequency signal to the outside in a form of an electromagnetic wavethrough the antenna. When data is sent to the terminal device, the radiofrequency circuit receives a radio frequency signal through the antenna,converts the radio frequency signal into a baseband signal, and outputsthe baseband signal to the processor. The processor converts thebaseband signal into data, and processes the data. For ease ofdescription, FIG. 12 shows only one memory and one processor. In anactual terminal device product, there may be one or more processors andone or more memories. The memory may also be referred to as a storagemedium, a storage device, or the like. The memory may be disposedindependent of the processor, or may be integrated with the processor.This is not limited in this embodiment of this application.

In this application, the antenna and the radio frequency circuit thathave receiving and sending functions may be considered as a transceiverunit of the terminal device, and the processor having a processingfunction may be considered as a processing unit of the terminal device.As shown in FIG. 12, the terminal device includes a transceiver unit1210 and a processing unit 1220. The transceiver unit 1210 may also bereferred to as a transceiver, a transceiver apparatus, or the like. Theprocessing unit 1220 may also be referred to as a processor, aprocessing board, a processing module, a processing apparatus, or thelike. Optionally, a component for implementing a receiving function inthe transceiver unit 1210 may be considered as a receiving unit, and acomponent for implementing a sending function in the transceiver unit1210 may be considered as a sending unit. That is, the transceiver unit1210 includes the receiving unit and the sending unit. The transceiverunit 1210 may also be sometimes referred to as a transceiver, atransceiver circuit, or the like. The receiving unit may also besometimes referred to as a receiver, a receiving circuit, or the like.The sending unit may also be sometimes referred to as a transmitter, atransmitting circuit, or the like.

It should be understood that the transceiver unit 1210 is configured toperform a sending operation and a receiving operation on a terminaldevice side in the foregoing method embodiments, and the processing unit1220 is configured to perform an operation other than thereceiving/sending operation of the terminal device in the foregoingmethod embodiments.

For example, in an implementation, the transceiver unit 1210 isconfigured to perform a sending operation on a terminal device side instep 801 and step 802 in FIG. 8, and/or the transceiver unit 1210 isfurther configured to perform another receiving/sending operation on theterminal device side in this application. The processing unit 1220 isconfigured to determine first capability information for a first networkdevice and determine second capability information for a second networkdevice in FIG. 8, and/or the processing unit 1220 is further configuredto perform another processing step on the terminal device side in thisapplication.

It may be understood that the processor in this application may be acentral processing unit (CPU), may be another general-purpose processor,a digital signal processor (DSP), an application specific integratedcircuit (ASIC), a field programmable gate array (FPGA), or anotherprogrammable logic device, a transistor logic device, a hardwarecomponent, or any combination thereof. The general-purpose processor maybe a microprocessor or any conventional processor.

The method steps in the embodiments of this application may beimplemented in a hardware manner or may be implemented in a manner ofexecuting a software instruction by a processor. The softwareinstruction may include a corresponding software module. The softwaremodule may be stored in a random access memory (RAM), a flash memory, aread-only memory (ROM), a programmable read-only memory (ProgrammableROM, PROM), an erasable programmable read-only memory (ErasableProgrammable ROM, EPROM), an electrically erasable programmableread-only memory (Electrically EPROM, EEPROM), a register, a hard disk,a mobile hard disk, a CD-ROM, or any other form of storage mediumwell-known in the art. For example, a storage medium is coupled to aprocessor, so that the processor can read information from the storagemedium or write information into the storage medium. Certainly, thestorage medium may alternatively be a component of the processor. Theprocessor and the storage medium may be located in an ASIC. In addition,the ASIC may be located in a network device or a terminal device.Certainly, the processor and the storage medium may alternatively existin the network device or the terminal device as discrete assemblies.

All or some of the foregoing embodiments may be implemented by usingsoftware, hardware, firmware, or any combination thereof. When softwareis used to implement the embodiments, the embodiments may be implementedcompletely or partially in a form of a computer program product. Thecomputer program product includes one or more computer programs orinstructions. When the computer programs or the instructions are loadedand executed on a computer, the procedures or functions in theembodiments of this application are all or partially performed. Thecomputer may be a general-purpose computer, a dedicated computer, acomputer network, a network device, a user device, or anotherprogrammable apparatus. The computer programs or the instructions may bestored in a computer-readable storage medium or may be transmitted froma computer-readable storage medium to another computer-readable storagemedium. For example, the computer programs or the instructions may betransmitted from a website, computer, server, or data center to anotherwebsite, computer, server, or data center in a wired or wireless manner.The computer-readable storage medium may be any usable medium accessibleby a computer, or a data storage device, such as a server or a datacenter, integrating one or more usable media. The usable medium may be amagnetic medium such as a floppy disk, a hard disk, or a magnetic tape,may be an optical medium such as a digital video disc (DVD), or may be asemiconductor medium such as a solid-state drive (SSD).

In the embodiments of this application, unless otherwise stated or thereis a logical conflict, terms and/or descriptions between differentembodiments are consistent and may be mutually referenced, and technicalfeatures in different embodiments may be combined according to aninternal logical relationship thereof, to form a new embodiment.

“A plurality of” in this application refers to two or more than two. Theterm “and/or” describes an association relationship between associatedobjects and indicates that three relationships may exist. For example, Aand/or B may indicate the following three cases: Only A exists, both Aand B exist, and only B exists. A and B may be in a singular or pluralform. In the text description of this application, the character “/”indicates an “or” relationship between the associated objects. In aformula in this application, the character “/” indicates a “division”relationship between the associated objects.

It may be understood that numerical symbols used in the embodiments ofthis application are differentiated merely for ease of description, butare not used to limit the scope of the embodiments of this application.Sequence numbers of the foregoing processes do not mean executionsequences, and the execution sequences of the processes should bedetermined based on functions and internal logic of the processes.

A person of ordinary skill in the art may be aware that, in combinationwith the examples described in the embodiments disclosed in thisspecification, units and algorithm steps may be implemented byelectronic hardware or a combination of computer software and electronichardware. Whether the functions are performed by hardware or softwaredepends on particular applications and design constraint conditions ofthe technical solutions. A person skilled in the art may use differentmethods to implement the described functions for each particularapplication, but it should not be considered that the implementationgoes beyond the scope of this application.

It may be clearly understood by a person skilled in the art that, forthe purpose of convenient and brief description, for a detailed workingprocess of the foregoing system, apparatus, and unit, refer to acorresponding process in the foregoing method embodiments. Details arenot described herein again.

In the several embodiments provided in this application, it should beunderstood that the disclosed system, apparatus, and method may beimplemented in other manners. For example, the described apparatusembodiment is merely an example. For example, division into the units ismerely logical function division and may be other division in actualimplementation. For example, a plurality of units or components may becombined or integrated into another system, or some features may beignored or not performed. In addition, the displayed or discussed mutualcouplings or direct couplings or communication connections may beimplemented through some interfaces. The indirect couplings orcommunication connections between the apparatuses or units may beimplemented in electrical, mechanical, or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,may be located at one position, or may be distributed on a plurality ofnetwork units. Some or all of the units may be selected based on actualrequirements to achieve the objectives of the solutions of theembodiments.

In addition, functional units in the embodiments of this application maybe integrated into one processing unit, or each of the units may existalone physically, or two or more units are integrated into one unit.

When the functions are implemented in a form of a software functionalunit and sold or used as an independent product, the functions may bestored in a computer-readable storage medium. Based on such anunderstanding, the technical solutions of this application essentially,or the part contributing to the current technology, or some of thetechnical solutions may be implemented in a form of a software product.The computer software product is stored in a storage medium, andincludes several instructions for instructing a computer device (whichmay be a personal computer, a server, a network device, or the like) toperform all or some of the steps of the methods described in theembodiments of this application. The foregoing storage medium includes:any medium that can store program code, such as a USB flash drive, aremovable hard disk, a read-only memory (ROM), a random access memory(RAM), a magnetic disk, or an optical disc.

The foregoing descriptions are merely specific implementations of thisapplication, but are not intended to limit the protection scope of thisapplication. Any variation or replacement readily figured out by aperson skilled in the art within the technical scope disclosed in thisapplication shall fall within the protection scope of this application.Therefore, the protection scope of this application shall be subject tothe protection scope of the claims.

What is claimed is:
 1. A method for configuring cross-link interference(CLI) measurement, the method comprising: receiving, by a first networkdevice, a first message from a second network device, wherein the firstmessage indicates information about a cross-link interference (CLI)measurement; and configuring, by the first network device, the CLImeasurement for a terminal device based on the first message.
 2. Themethod according to claim 1, wherein: the information about the CLImeasurement comprises a quantity of resources of the CLI measurement;and the first message indicates one of the following: a quantity ofresources of the CLI measurement that are configured by the secondnetwork device for the terminal device; a maximum quantity of resourcesthat are of the CLI measurement and that the first network device isallowed to configure for the terminal device; a quantity of resources ofthe CLI measurement that are configured by the second network device forthe terminal device in each unit of time; or a maximum quantity ofresources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device in each unit oftime.
 3. The method according to claim 2, wherein the method furthercomprises: sending, by the first network device, a second message to thesecond network device in response to determining that the quantity,indicated by the first message, of resources of the CLI measurement doesnot meet a first threshold, wherein: the second message notifies thesecond network device to adjust the quantity of resources of the CLImeasurement that are configured for the terminal device, or notifies thesecond network device to adjust the quantity of resources that are ofthe CLI measurement and that the first network device is allowed toconfigure for the terminal device.
 4. The method according to claim 1,wherein: the information about the CLI measurement comprisesconfiguration information of a resource of the CLI measurement; and thefirst message indicates configuration information of a resource that isof the CLI measurement and that the second network device plans toconfigure for the terminal device.
 5. The method according to claim 4,wherein the method further comprises: determining, by the first networkdevice based on the first message and configuration information of aresource that is of the CLI measurement and that the first networkdevice plans to configure for the terminal device, a total quantity ofresources of the CLI measurement that are configured by the firstnetwork device and the second network device for the terminal device;and adjusting, by the first network device, the configurationinformation of the resource that the first network device plans toconfigure for the terminal device in response to a determination thatthe total quantity is greater than a second threshold, wherein thesecond threshold is one of the following: a maximum quantity ofresources of the CLI measurement; a maximum quantity, supported by theterminal device, of resources of the CLI measurement; a maximum quantityof resources of the CLI measurement in each unit of time; or a maximumquantity, supported by the terminal device, of resources of the CLImeasurement in each unit of time.
 6. The method according to claim 1,wherein: the first message indicates one of the following: configuring,by the second network device, the CLI measurement for the terminaldevice; allowing the first network device to configure the CLImeasurement for the terminal device; or indicating the first networkdevice to configure the CLI measurement for the terminal device; and themethod further comprises: sending, by the first network device, a thirdmessage to the second network device, wherein the third message querieswhether the first network device is allowed to configure the CLImeasurement for the terminal device.
 7. The method according to claim 2,wherein the resources comprise a sounding reference signal (SRS)resource or a received signal strength indicator (RSSI) resource.
 8. Amethod for configuring cross-link interference (CLI) measurement, themethod comprising: determining, by a second network device, a firstmessage, wherein the first message indicates information about across-link interference (CLI) measurement; and sending, by the secondnetwork device, the first message to a first network device.
 9. Themethod according to claim 8, wherein: the information about the CLImeasurement comprises a quantity of resources of the CLI measurement;and the first message indicates one of the following: a quantity ofresources of the CLI measurement that are configured by the secondnetwork device for a terminal device; a maximum quantity of resourcesthat are of the CLI measurement and that the first network device isallowed to configure for the terminal device; a quantity of resources ofthe CLI measurement that are configured by the second network device forthe terminal device in each unit of time; or a maximum quantity ofresources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device in each unit oftime.
 10. The method according to claim 9, wherein the method furthercomprises: receiving, by the second network device, a second messagefrom the first network device; and adjusting, by the second networkdevice based on the second message, the quantity of resources of the CLImeasurement that are configured for the terminal device; or adjusting,by the second network device based on the second message, the quantityof resources that are of the CLI measurement and that the first networkdevice is allowed to configure for the terminal device.
 11. The methodaccording to claim 8, wherein: the information about the CLI measurementcomprises configuration information of a resource of the CLImeasurement; and the first message indicates configuration informationof a resource that is of the CLI measurement and that the second networkdevice plans to configure for a terminal device.
 12. The methodaccording to claim 8, wherein the method further comprises: receiving,by the second network device, a third message from the first networkdevice, wherein the third message queries whether the first networkdevice is allowed to configure the CLI measurement for a terminaldevice.
 13. The method according to claim 9, wherein the resourcescomprises a sounding reference signal (SRS) resource or a receivedsignal strength indicator (RSSI) resource.
 14. An apparatus, comprising:at least one processor; and one or more memories coupled to the at leastone processor and storing program instructions for execution by the atleast one processor to: receive, by a first network device, a firstmessage from a second network device, wherein the first messageindicates information about a cross-link interference (CLI) measurement;and configure, by the first network device, the CLI measurement for aterminal device based on the first message.
 15. The apparatus accordingto claim 14, wherein: the information about the CLI measurementcomprises a quantity of resources of the CLI measurement; and the firstmessage indicates one of the following: a quantity of resources of theCLI measurement that are configured by the second network device for theterminal device; a maximum quantity of resources that are of the CLImeasurement and that the first network device is allowed to configurefor the terminal device; a quantity of resources of the CLI measurementthat are configured by the second network device for the terminal devicein each unit of time; or a maximum quantity of resources that are of theCLI measurement and that the first network device is allowed toconfigure for the terminal device in each unit of time.
 16. Theapparatus according to claim 15, wherein the one or more memories storethe program instructions for execution by the at least one processor to:send, by the first network device, a second message to the secondnetwork device in response to determining that the quantity, indicatedby the first message, of resources of the CLI measurement does not meeta first threshold, wherein: the second message notifies the secondnetwork device to adjust the quantity of resources of the CLImeasurement that are configured for the terminal device, or notifies thesecond network device to adjust the quantity of resources that are ofthe CLI measurement and that the first network device is allowed toconfigure for the terminal device.
 17. The apparatus according to claim14, wherein: the information about the CLI measurement comprisesconfiguration information of a resource of the CLI measurement; and thefirst message indicates configuration information of a resource that isof the CLI measurement and that the second network device plans toconfigure for the terminal device.
 18. The apparatus according to claim17, wherein the one or more memories store the program instructions forexecution by the at least one processor to: determine, by the firstnetwork device based on the first message and configuration informationof a resource that is of the CLI measurement and that the first networkdevice plans to configure for the terminal device, a total quantity ofresources of the CLI measurement that are configured by the firstnetwork device and the second network device for the terminal device;and adjusting, by the first network device, the configurationinformation of the resource that the first network device plans toconfigure for the terminal device in response to a determination thatthe total quantity is greater than a second threshold, wherein thesecond threshold is one of the following: a maximum quantity ofresources of the CLI measurement; a maximum quantity, supported by theterminal device, of resources of the CLI measurement; a maximum quantityof resources of the CLI measurement in each unit of time; or a maximumquantity, supported by the terminal device, of resources of the CLImeasurement in each unit of time.
 19. The apparatus according to claim14, wherein: the first message indicates one of the following:configuring, by the second network device, the CLI measurement for theterminal device; allowing the first network device to configure the CLImeasurement for the terminal device; or indicating the first networkdevice to configure the CLI measurement for the terminal device; and theone or more memories store the program instructions for execution by theat least one processor to: send, by the first network device, a thirdmessage to the second network device, wherein the third message querieswhether the first network device is allowed to configure the CLImeasurement for the terminal device.
 20. The apparatus according toclaim 15, wherein the resources comprise a sounding reference signal(SRS) resource or a received signal strength indicator (RSSI) resource.